Sesquiterpenoids from Incarvillea arguta: Absolute Configuration and Biological Evaluation
journal contributionposted on 22.06.2012, 00:00 by Yong-Ming Yan, Gui-Sheng Wu, Xiao-Ping Dong, Lan Shen, Yan Li, Jia Su, Huai-Rong Luo, Hua-Jie Zhu, Yong-Xian Cheng
Diincarvilones A–D (1–4), incarvilone A (5), and a known compound, argutosine B (6), were isolated from Incarvillea arguta. The structures, including the absolute configurations of the new compounds, were determined by NMR spectroscopy, X-ray diffraction analysis, CD spectroscopy, and a variety of computational methods. The biological properties of these substances, including effects on intracellular Ca2+ influx, nitric oxide (NO) production, and human cancer cells, were evaluated. The results showed that at the concentration of 10 μM (in HBSS buffer) diincarvilones A and B cause a persistent increase in cytoplasmic calcium levels in A549 cells.